how does someone build a website that is more than a blog?

[ABC,]

how do people make a website such as: http://www.younow.com
http://www.youtube.com
http://www.google.com
like i website that does stuff, like upload videos, broadcast, or search something? how do they do it?

[Jake]

The major sites have staffs of expert coders who create custom sites from the ground up. Small time operators may have to start with a pre-programmed site template, like the countless designs available from templateminster.com (these are typically created with at least a professional html editor like Dreamweaver and an image editor like Photoshop.) A free editor like Kompozer is sufficient for light touch up or simple site design work.
If you want to mimic a popular site design you can probably find a programmed script for not too much money.

The first result for a search of: youtube clone script is a directory of site template sources.

About 17% of the top 1 Million sites are Wordpress based, the number of theme and plugin options allow you to create a site with a look and functionality unlike a blog.

[Sophie]

They are the developers and coders, learn the developing with coding language, you too can create a site